20985203 has 2 divisors, whose sum is σ = 20985204. Its totient is φ = 20985202.

The previous prime is 20985199. The next prime is 20985227. The reversal of 20985203 is 30258902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20985203 - 2² = 20985199 is a prime.

It is not a weakly prime, because it can be changed into another prime (20985703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10492601 + 10492602.

It is an arithmetic number, because the mean of its divisors is an integer number (10492602).

Almost surely, 2^20985203 is an apocalyptic number.

20985203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20985203 is an equidigital number, since it uses as much as digits as its factorization.

20985203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 20985203 is about 4580.9609253955. The cubic root of 20985203 is about 275.8276027283.

The spelling of 20985203 in words is "twenty million, nine hundred eighty-five thousand, two hundred three".